package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;


    //调用微信服务端的接口
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";


    //微信登录
    public User wxlogin(UserLoginDTO userLoginDTO) {

        String openid = getopenid(userLoginDTO.getCode());//获取openid

        //判断openid有没有真的获取到
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户，如果是新用户，将身份信息增加到数据库中，完成自动注册功能
        User user = userMapper.geybyopenid(openid);
        if (user == null){
            //新用户 自动注册
             user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
             userMapper.insert(user);
        }

        return user;
    }

    private String getopenid(String code){
        //需要向微信端接口 ， 获取用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid" , weChatProperties.getAppid());
        map.put("secret" ,weChatProperties.getSecret());
        map.put("js_code" , code);
        map.put("grant_type" , "authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN, map); //发送get的请求

        JSONObject jsonObject = JSON.parseObject(json);  //将获取到的字符串数据转成json格式，获取其中的openid
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
